see what your task is a function of - it may be a chunk instead of just an element.

One reason this task was so difficult for me is that you sort of had to switch gears... up to now in the book every problem involved moving through the list or making decisions about the list one element at a time. In this particular problem, a decision had to be made on a chunk of the input list not just one element.

So, this is the first case where I had to get a chunk of the string and develop code that operated as a function of a chunk of data as opposed to one piece.